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Tool-maker's skull (above) is smaller than the gorilla's (below, right) and modern man's (left). Lacking
only the lower jaw, the well-preserved fossil, anthropologists agree, locates Zinjanthropus in man's fam
ily tree with unusual accuracy. Zinjanthropus held his head erect. His front teeth, facial contours, and
mastoids resemble modern man's. But the flat forehead is primitive, even apelike. Dr. Leakey counts at
least 20 features in which his find is more like modern man than are the South African "near-men."